scholarly journals Novel Application of Hybrid Anion Exchange Resin for Phosphate Desorption Kinetics in Soils: Minimizing Re-Adsorption of Desorbed Ions

Soil Systems ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 36
Author(s):  
Zhe Li ◽  
Suwei Xu ◽  
Ying Li ◽  
Yuji Arai
Keyword(s):  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
The Other ◽  
Desorption Kinetics ◽  
Order Kinetic ◽  
Hybrid Resin ◽  
Phosphate Desorption ◽  
P Desorption ◽  
Resin Method

The process of phosphate desorption from soils is difficult to measure using stirred batch techniques because of the accumulation of desorbed ions in a bathing solution. To accurately measure the apparent rate coefficient of phosphate desorption from soils, it is necessary to remove the desorbed ions. In this study, a novel hybrid (i.e., iron oxide coated) anion exchange resin was used as a sink to study long-term (seven days) P desorption kinetics in intensively managed agricultural soils in the Midwestern U.S. (total phosphorus (TP): 196–419 mg/kg). The phosphate desorption kinetics in the hybrid anion exchange resin method were compared with those in the other conventional batch desorption method with pure anion exchange resins or without any sink. The extent of P desorption in the hybrid resin methods was >50% of total desorbed phosphate in the other methods. The initial kinetic rate estimated in the pseudo-second-order kinetic model was also highest (3.03–31.35 mg/(g·hr)) in the hybrid resin method when the same soil system was compared. This is because adsorbed P in the hybrid resins was nearly irreversible. The hybrid anion exchange resin might be a new and ideal sink in measuring the P desorption process in soils and sediments.

scholarly journals Phosphate desorption from soil in anion-exchange resin extraction

1978 ◽  
Vol 50 (4) ◽  
pp. 335-345
Author(s):  
Erkki Aura
Keyword(s):  
Activation Energy ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Soil Medium ◽  
Desorption Curve ◽  
Different Temperatures ◽  
Porous Soil ◽  
Phosphate Desorption ◽  
Resin Method

An attempt was made to clarify the mechanisms of phosphate desorption using the anion exchange resin method for extraction of phosphorus from soil. It was shown that there is a linear dependence between the amount of phosphorus desorbed and the square root of the desorption time. Through theoretical examination it was concluded that the above-mentioned relation between the desorption and time is a result of the diffusion of phosphate from porous soil medium. Using this interpretation of the desorption curve as a basis, the activation energy of the phosphate desorption was calculated from the experimental results obtained with resin extraction at different temperatures. The activation energy values were 32—64 kJ/mol depending on soils involved. In application of the results, the mechanisms and rate at different steps of the desorption were examined.

scholarly journals Determination of available soil phosphorus by chemical methods

1978 ◽  
Vol 50 (4) ◽  
pp. 305-316 ◽  
Author(s):  
Erkki Aura
Keyword(s):  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Soil Phosphorus ◽  
Phosphorus Uptake ◽  
Ammonium Fluoride ◽  
Acetate Solution ◽  
Phosphorus Status ◽  
Mineral Soils ◽  
Resin Method

Phosphorus uptake by oats in pot experiments was compared with phosphorus test values obtained for experimental soils. Phosphorus was extracted from the soil using acid ammonium acetate solution, Bray 1 solution, Olsen solution, ammonium fluoride, distilled water and anion exchange resin. Intensity values were determined by equilibrating the soils with 0.01 M CaCl2 solution. Soil samples were collected from 30 mineral soils. The best test for phosphorus status proved to be the anion exchange resin method. Good results were also obtained with simple water extraction. An advantage of the water and resin method is that the microstructure of the soil is not substantially changed when using these methods. An intensity measurement was not in itself sufficient for analysis of the phosphorus status, since the intensity drops rapidly when soil releases phosphorus.

An anion-exchange chromatographic method for measuring bilirubin covalently bound to albumin.

1985 ◽  
Vol 31 (8) ◽  
pp. 1317-1321 ◽  
Author(s):  
D Seligson ◽  
H Seligson ◽  
T W Wu
Keyword(s):  
Liquid Chromatography ◽  
Anion Exchange ◽  
Chromatographic Method ◽  
Total Bilirubin ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
The Other ◽  
Covalently Linked ◽  
Original Amount ◽  
Covalently Bound

Abstract After alkalinizing the diazo products of serum bilirubins, we apply them to a column of anion-exchange resin. The azodipyrroles derived from unconjugated and sugar-conjugated bilirubins, as well as from one half of the tetrapyrrole covalently linked to albumin ("Bil-Alb"), are anionic and protein-free and adsorb to the resin. The other half of the azo product of Bil-Alb, with absorptivity similar to that of the protein-free azodipyrroles, remains attached to albumin (Clin Chem 28:629-637, 1982) and passes through the resin unadsorbed. The color of the eluate correlates directly with the original amount of Bil-Alb present. Estimates of authentic Bil-Alb by the method agree with those by a Jendrassik-Gróf total-bilirubin method (in mg/L: intercept = -0.8, slope = 1.005, r = 0.999) and by liquid chromatography (Clin Chem 29:800-805, 1983) (n = 52, intercept = 5.2, slope = 0.724, r = 0.965). The CV of the method for serum with Bil-Alb of 99.4 mg/L was 3.8% (n = 8).

scholarly journals Quantitative Estimation of Sialic Acids. III. An Anion Exchange Resin Method.

1958 ◽  
Vol 12 ◽  
pp. 547-554 ◽  
Author(s):  
L. Svennerholm ◽  
Pentti K. Hietala ◽  
H. Löw ◽  
P. Siekevitz ◽  
L. Ernster ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Quantitative Estimation ◽  
Sialic Acids ◽  
Resin Method

PEMODELAN MATEMATIS ADSORPSI CO2 DENGAN STRONG BASE ANION EXCHANGE RESIN SEBAGAI ADSORBEN UNTUK PURIFIKASI BIOGAS

2015 ◽  
Vol 5 (1) ◽  
pp. 11
Author(s):  
Anies Mutiari ◽  
Wiratni Wiratni ◽  
Aswati Mindaryani
Keyword(s):  
Anion Exchange ◽  
Pilot Plant ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Scale Up ◽  
Sum Of Squares ◽  
Strong Base ◽  
Model Transfer ◽  
Plant Parameter

Pemurnian biogas telah banyak dilakukan untuk menghilangkan kadar CO2  dan meningkatkan kandungan CH4  yang terkandung di dalamnya. Kandungan CH4 yang tinggi akan memberikan unjuk kerja yang lebih baik. Model  matematis proses adsorpsi CO2 disusun berdasarkan teori lapisan film antar fasa, dimana pada proses yang ditinjau terdapat tiga fase yaitu gas, cair dan padat. Model matematis dari data eksperimental   kecepatan dan kesetimbangan proses adsorpsi CO2 melalui mekanisme pertukaran ion di suatu kolom adsorpsi telah dibuat. Model ini dibuat untuk mencari konstanta yang dapat dipergunakan pada proses scale up data laboratorium ke skala pilot plant. Parameter proses kecepatan yang dicari nilainya adalah koefisien transfer massa massa volumetris CO2 pada fase cair (kLa), koefisien transfer massa volumetris CO2 pada fasegas (kGa) dan tetapan laju reaksi (k1 dan k2). Pada hasil penelitian ini ditunjukkan bahwa nilai parameter yang diperoleh sesuai hasil fitting data dengan model matematis yang digunakan, yaitu model transfer massa pada lapisan film antar fase secara seri: adalah kGa, kla, k1 dan k2  dengan nilai Sum of Squares Error (SSE) rata-rata 0,0431. Perbandingan nilai kGa hasil simulasi dan teoritisnya memberikan kesalahan rata-rata 18,79%. Perbandingan nilai kLa hasil simulasi dan teoritis memberikan kesalahan rata-rata 7,92%.Kata kunci: model matematis, adsorpsi CO2, pemurnian biogas

Sign in / Sign up

Export Citation Format

Share Document